package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.minio.MinioProperties;
import com.atguigu.lease.web.admin.service.FileService;
import io.minio.*;
import io.minio.errors.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

@Service
public class FileServiceImpl implements FileService {

    @Autowired
    private MinioClient minioClient;
    @Autowired
    private MinioProperties minioProperties;

    /**
     * 文件上传
     * @param file
     * @return
     */
    @Override
    public String upload(MultipartFile file) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {


//            判断桶存不存在
        boolean b = minioClient.bucketExists(BucketExistsArgs.builder().
                bucket(minioProperties.getBucketName()).build());

        if (!b) {
//                如果不存在，创建桶
            minioClient.makeBucket(MakeBucketArgs.builder().bucket(minioProperties.getBucketName()).build());
            //设置访问权限
            String policy = createBucketPolicyConfig(minioProperties.getBucketName());
            minioClient.setBucketPolicy(SetBucketPolicyArgs.builder().bucket(minioProperties.getBucketName()).config(policy).build());
        }
        String filename = new SimpleDateFormat("yyyyMMdd").format(new Date()) +
                "/" + UUID.randomUUID() + "-" + file.getOriginalFilename(); //设置文件名
        minioClient.putObject(PutObjectArgs.builder()   //构造PutObjectArgs
                .bucket(minioProperties.getBucketName())  //设置存储的BucketName
                .stream(file.getInputStream(), file.getSize(), -1)  //设置文件大小
                .object(filename)
                .contentType(file.getContentType())
                .build()); //设置文件名

        String url = minioProperties.getEndpoint() + "/" + minioProperties.getBucketName() + "/" + filename;
        return url;
    }

    private String createBucketPolicyConfig(String bucketName) {

        return """
            {
              "Statement" : [ {
                "Action" : "s3:GetObject",
                "Effect" : "Allow",
                "Principal" : "*",
                "Resource" : "arn:aws:s3:::%s/*"
              } ],
              "Version" : "2012-10-17"
            }
            """.formatted(bucketName);
    }
}
